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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /*-
26: * Copyright (c) 1992, 1993
27: * The Regents of the University of California. All rights reserved.
28: *
29: * Redistribution and use in source and binary forms, with or without
30: * modification, are permitted provided that the following conditions
31: * are met:
32: * 1. Redistributions of source code must retain the above copyright
33: * notice, this list of conditions and the following disclaimer.
34: * 2. Redistributions in binary form must reproduce the above copyright
35: * notice, this list of conditions and the following disclaimer in the
36: * documentation and/or other materials provided with the distribution.
37: * 3. All advertising materials mentioning features or use of this software
38: * must display the following acknowledgement:
39: * This product includes software developed by the University of
40: * California, Berkeley and its contributors.
41: * 4. Neither the name of the University nor the names of its contributors
42: * may be used to endorse or promote products derived from this software
43: * without specific prior written permission.
44: *
45: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
46: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
49: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55: * SUCH DAMAGE.
56: *
57: * @(#)exec.h 8.1 (Berkeley) 6/11/93
58: */
59:
60: /* Size of a page in an object file. */
61: #define __LDPGSZ 4096
62:
63: /* Valid magic number check. */
64: #define N_BADMAG(ex) \
65: ((ex).a_magic != NMAGIC && (ex).a_magic != OMAGIC && \
66: (ex).a_magic != ZMAGIC)
67:
68: /* Address of the bottom of the text segment. */
69: #define N_TXTADDR(X) 0
70:
71: /* Address of the bottom of the data segment. */
72: #define N_DATADDR(ex) \
73: (N_TXTADDR(ex) + ((ex).a_magic == OMAGIC ? (ex).a_text \
74: : __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
75:
76: /* Text segment offset. */
77: #define N_TXTOFF(ex) \
78: ((ex).a_magic == ZMAGIC ? __LDPGSZ : sizeof(struct exec))
79:
80: /* Data segment offset. */
81: #define N_DATOFF(ex) \
82: (N_TXTOFF(ex) + ((ex).a_magic != ZMAGIC ? (ex).a_text : \
83: __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
84:
85: /* Symbol table offset. */
86: #define N_SYMOFF(ex) \
87: (N_TXTOFF(ex) + (ex).a_text + (ex).a_data + (ex).a_trsize + \
88: (ex).a_drsize)
89:
90: /* String table offset. */
91: #define N_STROFF(ex) (N_SYMOFF(ex) + (ex).a_syms)
92:
93: /* Description of the object file header (a.out format). */
94: struct exec {
95: #define OMAGIC 0407 /* old impure format */
96: #define NMAGIC 0410 /* read-only text */
97: #define ZMAGIC 0413 /* demand load format */
98: #define QMAGIC 0314 /* demand load format. Header in text. */
99: unsigned int a_magic; /* magic number */
100:
101: unsigned int a_text; /* text segment size */
102: unsigned int a_data; /* initialized data size */
103: unsigned int a_bss; /* uninitialized data size */
104: unsigned int a_syms; /* symbol table size */
105: unsigned int a_entry; /* entry point */
106: unsigned int a_trsize; /* text relocation size */
107: unsigned int a_drsize; /* data relocation size */
108: };
109:
110: /*
111: * Address of ps_strings structure (in user space).
112: */
113: #define PS_STRINGS \
114: ((struct ps_strings *)(USRSTACK - sizeof(struct ps_strings)))
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